[ros-users] Bad performances with cameradc1394

Eric Perko wisesage5001 at gmail.com
Wed May 12 11:30:53 UTC 2010

Have you tried using image_view (http://www.ros.org/wiki/image_view)
on your raw image topic?

For example, it should be something like 'rosrun image_view image_view
image:=/camera/image_raw'. You can determine the actual image topic
using 'rostopic list'.

If you still want to display with OpenCV, you can take a look at the
CvBridge package (http://www.ros.org/wiki/cv_bridge) to convert
between ROS images and OpenCV images.

- Eric

On Wed, May 12, 2010 at 6:04 AM, Shadow <sacha at shadowrobot.com> wrote:
> Hi,
> I am trying the camera1394 driver right now to see if the same problem
> occurs, but I can not manage to display the frame with that driver using
> opencv, like it was easy to do with cameradc.
> I am using the latest Ubuntu with kernel 2.6.32-22, and here is my
> firewire card :
> 00:08.0 FireWire (IEEE 1394): VIA Technologies, Inc. VT6306/7/8 [Fire
> II(M)] IEEE 1394 OHCI Controller (rev c0)
> 00:09.0 FireWire (IEEE 1394): NEC Corporation uPD72874 IEEE1394 OHCI 1.1
> 3-port PHY-Link Ctrlr (rev 01)
> If there is any integrated solution to display the stream, let me know,
> since the problem only occurs when it is displayed.
> Thanks.
> Le mardi 11 mai 2010 à 11:59 -0500, Jack O'Quin a écrit :
>> On Tue, May 11, 2010 at 11:31 AM, Eric Perko <wisesage5001 at gmail.com> wrote:
>> > Sacha,
>> >
>> > Have you seen the same behavior with the newer camera1394
>> > (http://www.ros.org/wiki/camera1394) driver or is this just the
>> > cameradc1394 driver?
>> If the problem appears with both drivers (likely IMHO), you are
>> probably not getting DMA access due to some difficulty in your
>> low-level library or kernel drivers.
>> What distribution, kernel and firewire card are you running?
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